Steering wheel boss

Hi everyone, I seem to be hitting a brick wall looking for a steering wheel boss to fit the momo steering wheel. I looked on all the sale sites but could not find anything, anyone point me in the right direction please?

Yeah thats my new project, used to belong to Ron Wester, screamin yellow DeLorean. Only had a few hours on her so far but going well. Have the engine running again and starting to clear her out. Plenty of parts needed when arranj gets back from holiday.